Update legacy Tuple-using code.

content/renderer/media/render_media_log_unittest.cc

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/test/simple_test_tick_clock.h"
 #include "content/common/view_messages.h"
 #include "content/public/test/mock_render_thread.h"
 #include "content/renderer/media/render_media_log.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 18 matching lines @@
   int message_count() { return render_thread_.sink().message_count(); }
 
   std::vector<media::MediaLogEvent> GetMediaLogEvents() {
     const IPC::Message* msg = render_thread_.sink().GetFirstMessageMatching(
         ViewHostMsg_MediaLogEvents::ID);
     if (!msg) {
       ADD_FAILURE() << "Did not find ViewHostMsg_MediaLogEvents IPC message";
       return std::vector<media::MediaLogEvent>();
     }
 
-    Tuple1<std::vector<media::MediaLogEvent> > events;
+    Tuple<std::vector<media::MediaLogEvent>> events;
     ViewHostMsg_MediaLogEvents::Read(msg, &events);
-    return events.a;
+    return get<0>(events);
   }
 
  private:
   MockRenderThread render_thread_;
   scoped_refptr<RenderMediaLog> log_;
   base::SimpleTestTickClock* tick_clock_;  // Owned by |log_|.
 
   DISALLOW_COPY_AND_ASSIGN(RenderMediaLogTest);
 };
 
@@ skipping 43 matching lines @@
   // event.
   std::vector<media::MediaLogEvent> events = GetMediaLogEvents();
   ASSERT_EQ(4u, events.size());
   EXPECT_EQ(media::MediaLogEvent::LOAD, events[0].type);
   EXPECT_EQ(media::MediaLogEvent::SEEK, events[1].type);
   EXPECT_EQ(media::MediaLogEvent::PLAY, events[2].type);
   EXPECT_EQ(media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED, events[3].type);
 }
 
 }  // namespace content